I do have one of those Harbor Freight setups pictured above but its an 80's model and I don't have the cfm rating for it. It's too low though. I have a 5hp Quincy but it is a single stage . I know I should have bought bigger but at the time that was $1100 and a two stage was even more. I was having trouble coming up with the even more part. Times have changed in which now you can get a very good 2 stage for that price. My Quincy is no slouch it does keep up pretty good though. I'm pretty sure the restriction is in the regulator orifice which is too small and produces low cfms. The tools start out fine and when the volume of the 3/8" hose runs out the regulator won't keep up. I was just wondering if anyone had some advice on a good regulator that will flow well and reasonably priced. I appreciate all the input so far and nice pictures, very good ideas guys.